The growth of thrust-faults provides critical insights into the tectonic evolution and evolution of hydrocarbon traps in fold-and-thrust belts. However, systematic analyses of the displacement profiles of faults in fold-and-thrust belts remain a great challenge because they require abundant seismic data. This study focuses on the sub-salt thrust system in the Kuqa Depression of the Tarim Basin, China, where six main thrust faults are interpreted to analyze the along-strike variations in fault displacement. The results reveal that the displacement profiles of the main thrusts exhibited significant variability in shape, peak values, and maximum displacement to fault length ratio. The growth of the sub-salt faults is controlled by the uplifted basement and the overlying salt. The basement uplift constrained the lateral propagation of the faults, and the paleo-uplift results in strike differences in the structural evolution of the fault system. In addition, large fault displacements are closely linked to thick overlying salt layers, highlighting the mechanical role of salt in facilitating displacement accumulation. These findings provide a better understanding of the growth patterns of thrust faults and their influencing factors.